Air base



FIG. 1 is a top plan view of an air base in accordance with myinvention;

FIG. 2 is a front elevational view thereof, the rear elevational viewbeing a mirror image;

FIG. 3 is a perspective view thereof;

FIG. 4 is a bottom view thereof; and,

FIG. 5 is a right side elevational view thereof, the left sideelevational view being a mirror image.

The structure indicated in the drawing figures by broken lines is notpart of the design sought to be patented in this application.

The ornamental design for an air base, as shown and described.